Levodopa dosage and ventilatory function in Parkinson's disease.
D000368:Aged; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D004334:Drug Administration Schedule; D005260:Female; D006801:Humans; D007980:Levodopa / Q000008:administration & dosage*; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000188:drug therapy* / Q000503:physiopathology; D012119:Respiration / Q000187:drug effects*; D012129:Respiratory Function Tests
D007980:Levodopa